Abstract:

The late development stage of chicken embryos （ the last week of hatching） and early development stage of chicken growth （ the first week after hatching） are the key phases for broiler basic metabolism development, body temperature adjustment and adaptability perfection to environment. Thermal mannipulations during broiler embryogenesis and the post-hatch period can improve thermotolerance acquisition, alleviate the heat stress response, reduce production loss and death in broiler challenged by heat stress.

Key words: thermal acclimation , heat exposure , broiler

摘要：

鸡胚发育后期（孵化期最后1周）和雏鸡生长发育早期（出雏后第1周）是肉鸡基础代谢、体温调节和对环境的适应能力完善的关键阶段。在胚胎发育后期和育雏早期分别给予 鸡胚或雏鸡适当强度的高温刺激，可以激活或完善其在极端热环境下的体热调控机制，增强其生长后期再次遭遇极端热环境的适应能力．从而从根本上减轻肉鸡遭遇夏季高温而引起的热应激反应，减缓生长速度的下降，减少死亡，大幅度降低夏季高温对肉鸡生产造成的损失。

关键词: 热习服 热暴露 适应性 肉鸡